Cool777 From , joined Dec 1969, posts, RR: Posted (12 years 10 months 3 days 19 hours ago) and read 3948 times:
Who knows how ground steering is performed on large commercial airplanes ? Is the nose wheel connected to the rudder pedals or, like in small airplanes, the steering performed by applying an asymmetrical breaks to the main landing gear ? And, whether the rudder panel is also moved when the airplane is taxiing ?
Laurent passet From , joined Dec 1969, posts, RR:
Reply 1, posted (12 years 10 months 3 days 17 hours ago) and read 3851 times:
steering on ground is performed by a short wheel closed to the sidestick for aibus. (2 wheels ,1 for 1st off. and 1 for captain)
when you turn this handwheel, the signal go to the Brake and Steering Control Unit (BSCU) and give information to the steering servovalve which apply hydraulic on the 2 steering actuator.
with the handwheel, you can turn the nose wheels at 78° in either direction (handwheel is available when aircraft speed in under 100kts)
you can also use rudder pedale for the steering but the steering angle is 2 to 6° , depend of the aircraft speed and if you use A/P.
Cdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 27
Reply 3, posted (12 years 10 months 2 days 11 hours ago) and read 3801 times:
Boeing aircraft use cabling to control their steering system.
Aircraft such as the B747 and B777 incorporate Body gear (B747) and Main gear (B777) steering. The Main/Body gear steering is dependent upon transducers to realy the position of the nose gear. At a certain degree...(I think apst 70 deg), the main gear turns to lessen the wear on tires and gives a better truning radius.
Mr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Reply 7, posted (12 years 9 months 3 weeks 3 days 10 hours ago) and read 3666 times:
> Cdfmxteck, you stated "Boeing aircraft use cabling to control their steering system". Can you please explain how these cables are attached to the hydraulic system used for the nosegear steering of a Boeing 747.
In the photo below of a 747's nosegear, you can see the hydraulic steering actuators on the aft side of the strut, near the ramp workers head.
Are there cables that run from the cockpit's tiller wheel and rudder pedals down to a hydraulic pump for the nosegear steering? If so...do you know the route?